From 15f5428989298ffc05b3ea341ca0b87739e973bc Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Sun, 21 Sep 2014 21:40:34 -0400
Subject: Adding switch to enable SOP balancing in '&flow2'.

---
 src/aig/gia/giaScript.c | 31 +++++++++++++++++++++----------
 src/base/abci/abc.c     | 13 +++++++++----
 2 files changed, 30 insertions(+), 14 deletions(-)

diff --git a/src/aig/gia/giaScript.c b/src/aig/gia/giaScript.c
index 042aef52..60be82f6 100644
--- a/src/aig/gia/giaScript.c
+++ b/src/aig/gia/giaScript.c
@@ -491,7 +491,7 @@ void Gia_ManPerformFlow( int fIsMapped, int nAnds, int nLevels, int nLutSize, in
   SeeAlso     []
 
 ***********************************************************************/
-void Gia_ManPerformFlow2( int fIsMapped, int nAnds, int nLevels, int nLutSize, int nCutNum, int fVerbose )
+void Gia_ManPerformFlow2( int fIsMapped, int nAnds, int nLevels, int nLutSize, int nCutNum, int fBalance, int fVerbose )
 {
     char Comm1[100], Comm2[100], Comm3[100], Comm4[100];
     sprintf( Comm1, "&synch2 -K %d; &if -m       -K %d -C %d; &save", nLutSize, nLutSize, nCutNum );
@@ -521,9 +521,12 @@ void Gia_ManPerformFlow2( int fIsMapped, int nAnds, int nLevels, int nLutSize, i
 
 
     // perform balancing
-    if ( fVerbose )
-        printf( "Trying SOP balancing...\n" );
-    Cmd_CommandExecute( Abc_FrameGetGlobalFrame(), "&st; &sopb -R 10 -C 4" );
+    if ( fBalance )
+    {
+        if ( fVerbose )
+            printf( "Trying SOP balancing...\n" );
+        Cmd_CommandExecute( Abc_FrameGetGlobalFrame(), "&st; &sopb -R 10 -C 4" );
+    }
 
 
     // perform synthesis
@@ -546,9 +549,13 @@ void Gia_ManPerformFlow2( int fIsMapped, int nAnds, int nLevels, int nLutSize, i
 
 
     // perform balancing
-    if ( fVerbose )
-        printf( "Trying SOP balancing...\n" );
-    Cmd_CommandExecute( Abc_FrameGetGlobalFrame(), "&st; &sopb -R 10" );
+    if ( fBalance )
+    {
+        if ( fVerbose )
+            printf( "Trying SOP balancing...\n" );
+        Cmd_CommandExecute( Abc_FrameGetGlobalFrame(), "&st; &sopb -R 10" );
+    }
+
 
     // perform synthesis
     Cmd_CommandExecute( Abc_FrameGetGlobalFrame(), Comm3 );
@@ -570,9 +577,13 @@ void Gia_ManPerformFlow2( int fIsMapped, int nAnds, int nLevels, int nLutSize, i
 
 
     // perform balancing
-    if ( fVerbose )
-        printf( "Trying SOP balancing...\n" );
-    Cmd_CommandExecute( Abc_FrameGetGlobalFrame(), "&st; &sopb -R 10" );
+    if ( fBalance )
+    {
+        if ( fVerbose )
+            printf( "Trying SOP balancing...\n" );
+        Cmd_CommandExecute( Abc_FrameGetGlobalFrame(), "&st; &sopb -R 10" );
+    }
+
 
     // perform synthesis
     Cmd_CommandExecute( Abc_FrameGetGlobalFrame(), Comm3 );
diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index 3eb0b31c..b6f8c5e4 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -30978,12 +30978,13 @@ usage:
 ***********************************************************************/
 int Abc_CommandAbc9Flow2( Abc_Frame_t * pAbc, int argc, char ** argv )
 {
-    extern void Gia_ManPerformFlow2( int fIsMapped, int nAnds, int nLevels, int nLutSize, int nCutNum, int fVerbose );
+    extern void Gia_ManPerformFlow2( int fIsMapped, int nAnds, int nLevels, int nLutSize, int nCutNum, int fBalance, int fVerbose );
     int nLutSize    =  6;
     int nCutNum     =  8;
+    int fBalance    =  0;
     int c, fVerbose =  0;
     Extra_UtilGetoptReset();
-    while ( ( c = Extra_UtilGetopt( argc, argv, "KCvh" ) ) != EOF )
+    while ( ( c = Extra_UtilGetopt( argc, argv, "KCbvh" ) ) != EOF )
     {
         switch ( c )
         {
@@ -31009,6 +31010,9 @@ int Abc_CommandAbc9Flow2( Abc_Frame_t * pAbc, int argc, char ** argv )
             if ( nCutNum < 0 )
                 goto usage;
             break;
+        case 'b':
+            fBalance ^= 1;
+            break;
         case 'v':
             fVerbose ^= 1;
             break;
@@ -31023,14 +31027,15 @@ int Abc_CommandAbc9Flow2( Abc_Frame_t * pAbc, int argc, char ** argv )
         Abc_Print( -1, "Abc_CommandAbc9Flow2(): There is no AIG.\n" );
         return 1;
     }
-    Gia_ManPerformFlow2( Gia_ManHasMapping(pAbc->pGia), Gia_ManAndNum(pAbc->pGia), Gia_ManLevelNum(pAbc->pGia), nLutSize, nCutNum, fVerbose );
+    Gia_ManPerformFlow2( Gia_ManHasMapping(pAbc->pGia), Gia_ManAndNum(pAbc->pGia), Gia_ManLevelNum(pAbc->pGia), nLutSize, nCutNum, fBalance, fVerbose );
     return 0;
 
 usage:
-    Abc_Print( -2, "usage: &flow2 [-KC num] [-vh]\n" );
+    Abc_Print( -2, "usage: &flow2 [-KC num] [-bvh]\n" );
     Abc_Print( -2, "\t         integration optimization and mapping flow\n" );
     Abc_Print( -2, "\t-K num : the number of LUT inputs (LUT size) [default = %d]\n", nLutSize );
     Abc_Print( -2, "\t-C num : the number of cuts at a node [default = %d]\n", nCutNum );
+    Abc_Print( -2, "\t-b     : toggle using SOP balancing during synthesis [default = %s]\n", fBalance? "yes": "no" );
     Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
     Abc_Print( -2, "\t-h     : print the command usage\n");
     return 1;
-- 
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